import Translator from './i18n'

export function copyTextToClipboard(text) {
  const t = new Translator($('html').attr('lang'))
  const textArea = document.createElement('textarea')

  //
  // *** This styling is an extra step which is likely not required. ***
  //
  // Why is it here? To ensure:
  // 1. the element is able to have focus and selection.
  // 2. if element was to flash render it has minimal visual impact.
  // 3. less flakyness with selection and copying which **might** occur if
  //    the textarea element is not visible.
  //
  // The likelihood is the element won't even render, not even a flash,
  // so some of these are just precautions. However in IE the element
  // is visible whilst the popup box asking the user for permission for
  // the web page to copy to the clipboard.
  //

  // Place in top-left corner of screen regardless of scroll position.
  textArea.style.position = 'fixed'
  textArea.style.top = 0
  textArea.style.left = 0

  // Ensure it has a small width and height. Setting to 1px / 1em
  // doesn't work as this gives a negative w/h on some browsers.
  textArea.style.width = '2em'
  textArea.style.height = '2em'

  // We don't need padding, reducing the size if it does flash render.
  textArea.style.padding = 0

  // Clean up any borders.
  textArea.style.border = 'none'
  textArea.style.outline = 'none'
  textArea.style.boxShadow = 'none'

  // Avoid flash of white box if rendered for any reason.
  textArea.style.background = 'transparent'

  textArea.value = text

  document.body.appendChild(textArea)

  textArea.select()

  try {
    const successful = document.execCommand('copy')
    const msg = successful ? 'successful' : 'unsuccessful'
    console.log('Copying text command was ' + msg)
  } catch (err) {
    window.prompt(t.get('cannotCopyToClipboardMessage'), text)
  }

  document.body.removeChild(textArea)
}
